I have one of those Igloo 72qt extreme coolers that I have been using just fine. My question is there is a lot of room left over if I use the 1.33qt/lb ratio. Most of my brews are around 17lb so that is only a little over 4g of strike water. then I add the rest of the sparge water to get to my target 13.5g boil size.
Can I add more water for the initial mash?